CN103663284B - A kind of hot rolling J section steel and application thereof - Google Patents
A kind of hot rolling J section steel and application thereof Download PDFInfo
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- CN103663284B CN103663284B CN201310565911.4A CN201310565911A CN103663284B CN 103663284 B CN103663284 B CN 103663284B CN 201310565911 A CN201310565911 A CN 201310565911A CN 103663284 B CN103663284 B CN 103663284B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 107
- 239000010959 steel Substances 0.000 title claims abstract description 107
- 238000005098 hot rolling Methods 0.000 title claims abstract description 71
- 230000007704 transition Effects 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 5
- 238000005096 rolling process Methods 0.000 abstract description 4
- 238000003466 welding Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 201000001371 inclusion conjunctivitis Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 206010044325 trachoma Diseases 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The present invention relates to a kind of hot rolling J section steel, it includes web, wing plate, described wing plate includes the first wing plate, the second wing plate and the 3rd wing plate, the two ends of described web are connected with the first wing plate and the 3rd wing plate respectively, first wing plate and the 3rd wing plate are positioned at the same side of web, two wing plates are parallel to each other and all vertical with web, and the second described wing plate and the first wing plate are connected and are connected with the end of web, and the second wing plate and the first wing plate are on same vertical plane and also vertical with web.The hot rolling J section steel of the present invention is used for forklift door frame manufacture, in hot rolling production process, being not required on finish rolling plain-barreled roll fluting, and the first wing plate and the second wing plate are on same vertical plane, fluting size, position and profile are easily controlled, compared with existing hot rolling J section steel, reducing the difficulty that hot rolling produces, hot rolling technique equipment simplifies, investment cost reduces, and substantially increases the efficiency that hot rolling produces, improve the rigidity of formed steel construction, reduce production cost.
Description
Technical field
The present invention relates to a kind of deformed steel, specifically a kind of hot rolling J shaped steel, belong to hot-rolled steel section technical field.
Background technology
Fork truck is as industrial transport vehicle, its equipment is mainly made up of inside and outside door frame, door frame is carrying out pitching in picking thing, lifting operation, the biggest tilting moment is produced for the centre of moment with propons, therefore forklift door frame is the most most important primary structure member of fork truck, gantry-shaped steel of forklift is welded after using plate cutting, and this welding shaped steel is welded by wing plate and web.In use need to undertake relatively big and cyclic load due to forklift hoisting system, the aspects such as the intensity of shaped steel, sectional dimension, profile linearity, flatness are required the highest, therefore, existing gantry-shaped steel of forklift suffers from the drawback that in welding process, 1, welding shaped steel needs to use complicated equipment, carry out loaded down with trivial details operation could manufacture, cause formation efficiency low；2, in cutting and welding process, metal consumption is more, causes metal utilization rate low；3, solder type steel making cycle length, cost height, and weld zone performance is the most unstable, is easily generated fatigue damage, the rigidity of structure causing door frame is poor, is unfavorable for the carrying of door frame and the guiding of roller, has a strong impact on stability and the economy of fork truck.
The successful exploitation of hot rolling forklift door frame deformed steel series of products, compensate for the defect of above-mentioned welding shaped steel, meets the manufacture demand of domestic fork truck to a certain extent.The shaped steel being applicable to forklift door frame at present has hot rolling C shape, H shape and J shape shaped steel, J-shaped shaped steel includes web, a pair wing plate and reinforcement, reinforcement is arranged on the lateral surface of web, find during production application, in hot rolling production process, due to reinforcement between two wing plates (namely on shape steel web), the setting of reinforcement increases the difficulty that hot rolling produces, cause technical equipment complexity, operation easier is big, investment cost is high, it is unfavorable for producing, makes production efficiency be substantially reduced.
Chinese patent CN2598981Y discloses a kind of shaped steel, i.e. Special-purpose portal frame section steel for forklift, and channel-section steel outside bottom surface, nearly side side edge are provided with the overhanging chimb parallel with side;And it is equipped with projection at the knuckle of inside and outside bottom surface.Add the rigidity of structure of shaped steel, improve the bearing capacity of door frame, this shaped steel is owing to being provided with the overhanging chimb parallel with side in channel-section steel outside bottom surface, nearly side side edge, the middle part at roll is needed again to slot in hot rolling production process, dimensional accuracy and profile are difficult to control to, for ensureing fluting precision, not only will increase roll consumption, and Roller Machining difficulty will be big, investment cost is high.
Summary of the invention
For the deficiencies in the prior art, the present invention provides a kind of hot rolling J shaped steel, and this J shaped steel hot rolling production difficulty in hot rolling production process is low, and operation easier is little, investment cost is low, it is easy to produces, substantially increases hot rolling production efficiency.
Technical scheme is as follows:
A kind of hot rolling J shaped steel, including web, wing plate, it is characterized in that, described wing plate includes the first wing plate, the second wing plate and the 3rd wing plate, the two ends of described web are connected with the first wing plate and the 3rd wing plate respectively, and the first wing plate and the 3rd wing plate are positioned at the same side of web, and two wing plates are parallel to each other and all vertical with web, the second described wing plate and the first wing plate are connected and are connected with the end of web, and the second wing plate and the first wing plate are on same vertical plane and also vertical with web.
The hot rolling J shaped steel of the present invention, first wing plate, second wing plate and the 3rd wing plate lay respectively at the end of web, first wing plate and the second wing plate connect and at same vertical plane, in hot rolling production process, it is not required on finish rolling plain-barreled roll fluting, and first wing plate and the second wing plate on same vertical plane, fluting size, position and profile are easily controlled, compared with existing hot rolling J shaped steel, reduce the difficulty that hot rolling produces, hot rolling technique equipment simplifies, investment cost reduces, substantially increase the efficiency that hot rolling produces, improve the rigidity of formed steel construction, reduce production cost.
Currently preferred, the junction of the second wing plate medial surface and web bottom side is provided with the projection protruding web bottom side, the described projection a length of 10 ~ 40mm on web length direction, it is 3 ~ 20mm that projection exceeds the height of web, and the outer surface of projection is smooth curved transition by the junction of projection and web bottom side to the junction of projection and the second wing plate medial surface.The advantage of this kind of design, apply in forklift door frame system, the length of the projection of the present invention and height are according to being the load-carrying according to fork truck and the thickness of roller and regioselective, projection on the one hand pair roller play the guiding role, on the other hand the setting of projection adds the rigidity of shaped steel, makes shaped steel opening rigidity increase, and deformation reduces, improve the bearing capacity having projection position, be integrally improved the bearing capacity of shaped steel.
Currently preferred, described 3rd wing plate medial surface is smooth curved transition with the junction of web bottom side, 3rd wing plate lateral surface is smooth curved transition with the junction of web upper side, and the first wing plate medial surface is smooth curved transition with the junction of web upper side.The advantage of this kind of design: applying in forklift door frame system, junction is that smooth curved transition makes stress evenly, integrally bending stress and local stress numerical more they tend to balance, and safety coefficient improves.
Preferably, described the first wing plate, the second wing plate, the thickness of the 3rd wing plate and the thickness ratio of web are 1:1 ~ 1.5:1, first wing plate, the second wing plate, the height of the 3rd wing plate and the lenth ratio of web are 1:2.5 ~ 1:3.5, further preferably, the first wing plate, the second wing plate, the height of the 3rd wing plate are equal 1:2.8 ~ 1:3.0 with the lenth ratio of web.Apply in forklift door frame system, the wing plate of the present invention and the thickness of web ratio and wing plate and the height and length of web than be diameter according to roller, the thickness of roller and regioselective, overcome that wing plate is easy to wear causes short defect in shaped steel service life, wing plate of the present invention and the thickness ratio of web, be that relevant professional and groped to obtain through long-term research according to abrasion and the service life of shaped steel
, make the wing plate of shaped steel more resistant to abrasion, extend the service life of shaped steel, save material simultaneously, reduce cost, improve fork truck bearing capacity simultaneously.
It is further preferred that described second wing plate and the shape of the 3rd wing plate, the most identical, the second wing plate, the cross section of the 3rd wing plate are rectangle, and four angles of rectangle are fillet.First wing plate of the present invention and the 3rd wing plate are positioned at the same side of web, and it is shape, the most identical, second wing plate is positioned at the opposite side of web, this kind of structure design improves shaped steel intensity, make shaped steel more firm, it is to avoid the stress between wing plate and web is concentrated, and applies in forklift door frame system, ensure that roller operates steadily, improve fork truck service life.
Preferably, described first wing plate, the second wing plate and the shape of the 3rd wing plate, thickness, the most identical, described the first wing plate, the second wing plate, the cross section of the 3rd wing plate are rectangle, and four angles of rectangle are fillet.In hot rolling production process, the first wing plate, the second wing plate and three wings board size and profile are easily controllable, it is easy to rolling, roll consumption is little, greatly reduces Roller Machining difficulty.
The J shaped steel of the present invention is formed in one hot rolling structure.Avoid wing plate that existing welding causes, web, wing plate deform with web junction, and wing plate and web junction sealing-off, enhance the rigidity of J shaped steel.
Currently preferred, described web upper side is parallel with web bottom side, and it is parallel with the first wing plate bottom side, the second wing plate bottom side, the 3rd wing plate bottom side, 3rd wing plate lateral surface and the first wing plate lateral surface, the second wing plate lateral surface are parallel, 3rd wing plate medial surface and the first wing plate medial surface, the second wing plate medial surface are parallel, and web upper side, web bottom side are all vertical with the first wing plate medial surface, the second wing plate medial surface, the 3rd wing plate medial surface.
Described the first wing plate, the second wing plate, the gauge tolerance of the 3rd wing plate are +/-1.0mm.
The present invention also provides for the application of a kind of hot rolling J shaped steel, and described hot rolling J shaped steel uses on the forklift door frame of 2.5 ~ 20.0t tonnage.
Further preferred, described hot rolling J shaped steel uses as the column of forklift door frame inner upright mounting, it is applied in combination with the outer mast column of equilateral channel steel, during combination, first wing plate lateral surface of hot rolling J shaped steel is close to one of them wing plate medial surface of equilateral channel steel, and the second wing plate, three wings backboard are to the two of equilateral channel steel wing plates.
The hot rolling J shaped steel of the present invention is for the column of forklift door frame inner upright mounting, inner upright mounting is risen, moves down and play the guiding role by the first wing plate, first wing plate lateral surface of hot rolling J shaped steel is close to one of them wing plate medial surface of equilateral channel steel, strictly control the gap between the first wing plate and the equilateral channel steel of hot rolling J shaped steel, make hot rolling J shaped steel with equilateral channel steel combination closely, roller is made to ensure that steadily when running, ensure that even running in inner upright mounting rising, folding process, the most overall weight alleviating door frame, has saved cost.
The present invention compared with prior art has the advantage that
1, the hot rolling J shaped steel of the present invention, first wing plate, second wing plate and the 3rd wing plate lay respectively at the end of web, first wing plate and the second wing plate connect and at same vertical plane, in hot rolling production process, it is not required on finish rolling plain-barreled roll fluting, and first wing plate and the second wing plate on same vertical plane, fluting size, position and profile are easily controlled, compared with existing hot rolling J shaped steel, reduce the difficulty that hot rolling produces, hot rolling technique equipment simplifies, investment cost reduces, substantially increase the efficiency that hot rolling produces, improve the rigidity of formed steel construction, reduce production cost.
2, the J shaped steel projection of the present invention on the one hand pair roller play the guiding role, and makes roller run more steady, and on the other hand the setting of projection adds the rigidity of shaped steel, shaped steel opening rigidity is made to increase, deformation reduces, and improves the bearing capacity having projection position, is integrally improved the bearing capacity of shaped steel.
3, the J shaped steel of the present invention is formed in one hot rolling structure, improve shaped steel intensity, making shaped steel more firm, can realize batch production and the supply of material, production efficiency and rate of metal significantly improve, avoid wing plate, web, wing plate and the deformation of web junction that welding causes, and wing plate and web junction sealing-off, enhance the rigidity of J shaped steel, reduce plate cutting waste product, the pore that occurs after simultaneously avoiding sheet material welding, trachoma, the defect such as deformation, improve product overall security.
4, the J shaped steel of the present invention overcomes short defect in wing plate shaped steel service life caused easy to wear, and the wing plate of shaped steel, more resistant to abrasion, extends the service life of shaped steel, saves material simultaneously, reduces cost, improves fork truck bearing capacity simultaneously.
Accompanying drawing explanation
Fig. 1 is the hot rolling J formed steel construction schematic diagram of embodiment 1；
Fig. 2 is the hot rolling J formed steel construction schematic diagram of embodiment 7；
Fig. 3 is the structural representation after hot rolling J shaped steel and the equilateral channel steel of embodiment 7 combines；
In figure, the 1, first wing plate, the 2, second wing plate, 3, the 3rd wing plate, 4, web, 5, projection, 6, web upper side, 7, web bottom side, the 8, first wing plate medial surface, 9, the first wing plate lateral surface, the 10, second wing plate medial surface, the 11, second wing plate lateral surface, 12, the 3rd wing plate medial surface, 13, the 3rd wing plate lateral surface, 14, equilateral channel steel, 15, the medial surface of equilateral channel steel wing plate.
Detailed description of the invention
With embodiment, the present invention is described further below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to this.
Embodiment 1:
A kind of hot rolling J shaped steel, structure is as shown in Fig. 1, including web 4, wing plate, wing plate includes the first wing plate the 1, second wing plate 2 and the 3rd wing plate 3, the two ends of web 4 are connected with the first wing plate 1 and the 3rd wing plate 3 respectively, first wing plate 1 and the 3rd wing plate 3 are positioned at the same side of web 4, first wing plate 1 is parallel to each other with the 3rd wing plate 3 and all vertical with web 4, second wing plate 2 is connected with the first wing plate 1 and is connected with the end of web 4, and the second wing plate 2 is on same vertical plane with the first wing plate 1 and also vertical with web 4.3rd wing plate medial surface 12 is smooth curved transition with the junction of web bottom side 7,3rd wing plate lateral surface 13 is smooth curved transition with the junction of web upper side 6, second wing plate medial surface 10 is smooth curved transition with the junction of web bottom side 7, and the first wing plate medial surface 8 is smooth curved transition with the junction of web upper side 6.This hot rolling J shaped steel is formed in one hot rolling structure.
Web upper side 6 is parallel with web bottom side 7, and it is parallel with the first wing plate bottom side, the second wing plate bottom side, the 3rd wing plate bottom side (all not marking in figure), 3rd wing plate lateral surface 13 is parallel with first wing plate lateral surface the 9, second wing plate lateral surface 11,3rd wing plate medial surface 12 is parallel with first wing plate medial surface the 8, second wing plate medial surface 10, and web upper side 6, web bottom side 7 are all vertical with first wing plate medial surface the 8, second wing plate medial surface the 10, the 3rd wing plate medial surface 12.
Second wing plate 2 and the shape of the 3rd wing plate 3, the most identical, the cross section of the second wing plate the 2, the 3rd wing plate 3 is rectangle, and four angles of rectangle are fillet.
The gauge tolerance of first wing plate the 1, second wing plate the 2, the 3rd wing plate 3 is +/-1.0mm.
Embodiment 2:
A kind of hot rolling J shaped steel, structure is with embodiment 1, and difference is:
Second wing plate 2 and the shape of the 3rd wing plate 3, the most identical.The cross section of the second wing plate the 2, the 3rd wing plate 3 is rectangle, four angles of rectangle are fillet, the thickness of the first wing plate 1 and the thickness ratio of web 4 are 1:1, the thickness of the second wing plate 2 and the thickness ratio of web 4 are 1.2:1, the thickness of the 3rd wing plate 3 and the thickness ratio of web 4 are 1.3:1, the height of the first wing plate 1 and the lenth ratio of web 4 are 1:3, the height of the second wing plate 2 and the lenth ratio of web 4 are 1:2.5, and the height of the 3rd wing plate 3 and the lenth ratio of web 4 are 1:2.5.
Embodiment 3:
A kind of hot rolling J shaped steel, structure is with embodiment 1, and difference is:
First wing plate the 1, second wing plate 2 and the shape of the 3rd wing plate 3, thickness, the most identical.The cross section of first wing plate the 1, second wing plate the 2, the 3rd wing plate 3 is rectangle, four angles of rectangle are fillet, the thickness of the first wing plate 1 and the thickness ratio of web 4 are 1:1, the thickness of the second wing plate 2 and the thickness ratio of web 4 are 1:1, the thickness of the 3rd wing plate 3 and the thickness ratio of web 4 are 1:1, the height of the first wing plate 1 and the lenth ratio of web 4 are 1:2.5, the height of the second wing plate 2 and the lenth ratio of web 4 are 1:2.5, and the height of the 3rd wing plate 3 and the lenth ratio of web 4 are 1:2.5.
Embodiment 4:
A kind of hot rolling J shaped steel, structure is with embodiment 3, and difference is:
The thickness of the first wing plate 1 and the thickness ratio of web 4 are 1.5:1, the thickness of the second wing plate 2 and the thickness ratio of web 4 are 1.5:1, the thickness of the 3rd wing plate 3 and the thickness ratio of web 4 are 1.5:1, the height of the first wing plate 1 and the lenth ratio of web 4 are 1:3.5, the height of the second wing plate 2 and the lenth ratio of web 4 are 1:3.5, and the height of the 3rd wing plate 3 and the lenth ratio of web 4 are 1:3.5.
Embodiment 5:
A kind of hot rolling J shaped steel, structure is with embodiment 3, and difference is:
The thickness of the first wing plate 1 and the thickness ratio of web 4 are 1.3:1, the thickness of the second wing plate 2 and the thickness ratio of web 4 are 1.3:1, the thickness of the 3rd wing plate 3 and the thickness ratio of web 4 are 1.3:1, the height of the first wing plate 1 and the lenth ratio of web 4 are 1:3, the height of the second wing plate 2 and the lenth ratio of web 4 are 1:3, and the height of the 3rd wing plate 3 and the lenth ratio of web 4 are 1:3.
Embodiment 6:
A kind of hot rolling J shaped steel, structure is with embodiment 3, and difference is:
The thickness of the first wing plate 1 and the thickness ratio of web 4 are 1.3:1, the thickness of the second wing plate 2 and the thickness ratio of web 4 are 1.3:1, the thickness of the 3rd wing plate 3 and the thickness ratio of web 4 are 1.3:1, the height of the first wing plate 1 and the lenth ratio of web 4 are 1:2.8, the height of the second wing plate 2 and the lenth ratio of web 4 are 1:2.8, and the height of the 3rd wing plate 3 and the lenth ratio of web 4 are 1:2.8.
Embodiment 7:
A kind of hot rolling J shaped steel, structure is with embodiment 1 or embodiment 2 or embodiment 1, and difference is:
The projection 5 protruding web bottom side 7 it is provided with in the junction of the second wing plate medial surface 10 with web bottom side 7, the projection a length of 10mm on web length direction, it is 3mm that projection exceeds the height of web, and the outer surface of projection 5 is smooth curved transition by the junction of projection 5 and web bottom side 7 to the junction of projection and the second wing plate medial surface 10.This hot rolling J section steel uses as the column of forklift door frame inner upright mounting, it is applied in combination with equilateral channel steel, during combination, first wing plate lateral surface 9 of hot rolling J shaped steel is close to one of them wing plate medial surface 15 of equilateral channel steel, second wing plate, three wings backboard are to the two of equilateral channel steel wing plates, and structure is as shown in Fig. 2.
Embodiment 8:
A kind of hot rolling J shaped steel, structure is with embodiment 7, and difference is:
The projection a length of 30mm on web length direction, it is 15mm that projection exceeds the height of web.
Embodiment 9:
A kind of hot rolling J shaped steel, structure is with embodiment 7, and difference is:
The projection a length of 28mm on web length direction, it is 10mm that projection exceeds the height of web.
Claims (7)
- null1. a hot rolling J shaped steel，Including web、Wing plate，It is characterized in that，Described hot rolling J shaped steel uses on the forklift door frame of 2.5 ~ 20.0t tonnage，Described wing plate includes the first wing plate、Second wing plate and the 3rd wing plate，The two ends of described web are connected with the second wing plate and the 3rd wing plate respectively，Second wing plate and the 3rd wing plate are positioned at the same side of web，Two wing plates are parallel to each other and all vertical with web，The second described wing plate and the first wing plate are connected and are connected with the end of web，Second wing plate and the first wing plate are on same vertical plane and also vertical with web，The junction of the second wing plate medial surface and web bottom side is provided with the projection protruding web bottom side，The described projection a length of 10 ~ 40mm on web length direction，It is 3 ~ 20mm that projection exceeds the height of web，The outer surface of projection is smooth curved transition by the junction of projection and web bottom side to the junction of projection and the second wing plate medial surface；Described 3rd wing plate medial surface is smooth curved transition with the junction of web bottom side, and the 3rd wing plate lateral surface is smooth curved transition with the junction of web upper side, and the first wing plate medial surface is smooth curved transition with the junction of web upper side；Described the first wing plate, the second wing plate, the thickness of the 3rd wing plate and the thickness ratio of web are 1:1 ~ 1.5:1, and the first wing plate, the second wing plate, the height of the 3rd wing plate and the lenth ratio of web are 1:2.5 ~ 1:3.5.
- Hot rolling J shaped steel the most according to claim 1, it is characterised in that the first wing plate, the second wing plate, the height of the 3rd wing plate and the lenth ratio of web are equal 1:2.8 ~ 1:3.0.
- 3., according to the hot rolling J shaped steel described in claim 1, it is characterised in that described second wing plate and the shape of the 3rd wing plate, the most identical, the second wing plate, the cross section of the 3rd wing plate are rectangle, and four angles of rectangle are fillet.
- 4. according to the hot rolling J shaped steel described in claim 1, it is characterized in that, described first wing plate, the second wing plate and the shape of the 3rd wing plate, thickness, the most identical, described the first wing plate, the second wing plate, the cross section of the 3rd wing plate are rectangle, and four angles of rectangle are fillet.
- 5. according to the hot rolling J shaped steel described in claim 1, it is characterized in that, this hot rolling J shaped steel is formed in one hot rolling structure, described web upper side is parallel with web bottom side, and it is parallel with the first wing plate bottom side, the second wing plate bottom side, the 3rd wing plate bottom side, 3rd wing plate lateral surface and the first wing plate lateral surface, the second wing plate lateral surface are parallel, 3rd wing plate medial surface and the first wing plate medial surface, the second wing plate medial surface are parallel, and web upper side, web bottom side are all vertical with the first wing plate medial surface, the second wing plate medial surface, the 3rd wing plate medial surface.
- 6. according to the hot rolling J shaped steel described in claim 1, it is characterised in that described the first wing plate, the second wing plate, the gauge tolerance of the 3rd wing plate are +/-1.0mm.
- 7. according to the hot rolling J shaped steel described in claim 1, it is characterized in that, described hot rolling J shaped steel uses as the column of forklift door frame inner upright mounting, it is applied in combination with the outer mast column of equilateral channel steel, during combination, first wing plate lateral surface of hot rolling J section steel is close to one of them wing plate medial surface of equilateral channel steel, and the second wing plate, three wings backboard are to the two of equilateral channel steel wing plates.
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| CN105817477B (en) * | 2016-03-22 | 2016-12-07 | 北京金宇顺达科技有限公司 | The manufacture method of exclusion seal doorframe shaped steel |
| CN111721398B (en) * | 2020-06-23 | 2022-06-17 | 赵新华 | Beam-pumping unit support top amplitude detection device |
| CN112794243A (en) * | 2021-01-29 | 2021-05-14 | 山东钢铁股份有限公司 | A kind of hot-rolled J-section steel for forklift gantry |
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| CN203533179U (en) * | 2013-11-13 | 2014-04-09 | 莱芜钢铁集团有限公司 | Hot rolled J-type steel for forklift mast |
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| CN103663284A (en) | 2014-03-26 |
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Inventor after: Wang Zhongxue Inventor after: Ji Jinli Inventor after: Fu Chang Wei Inventor after: Yuan Pengju Inventor after: Liu Sheng Inventor after: Zhao Xinhua Inventor after: Song Yuqing Inventor before: Fu Chang Wei Inventor before: Zhao Xinhua Inventor before: Yuan Pengju Inventor before: Ji Jinli Inventor before: Huo Xiwei |
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